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readme.txt
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readme.txt
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---------------------------------------------------------------------------------------------------
_ _ _ _ _ _
| | | (_) | | (_) | |
_ __ ___ ___ ___| |__ | |_ _ __ | |_ _ __ _ ___ __| | ___
| '_ ` _ \ / _ \/ _ \ '_ \| | | '_ \ | __| '__| |/ _ \ / _` |/ _ \
| | | | | | __/ __/ |_) | | | |_) | | |_| | | | (_) | (_| | __/
|_| |_| |_|\___|\___|_.__/|_|_| .__/ \__|_| |_|\___/ \__,_|\___|
| |
|_|
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Change log
V1.20 2017.02.27
- MIDI fix so that triode plays nicely with MIDI clock
V1.11 2016.11.23
- Reverted filter decay envelope to use SUSTAIN switch, as in original release
V1.10 2016.11.12
- Updated MIDI code to exit interrupt immediately if MIDI command is unrecognized
- Increased front panel switch scanning rate (10X faster)
- Reduced pitchbend to ± 3 semitones
- Altered filter decay envelope to ignore SUSTAIN switch so that filter sweeps continue when key is released
- Removed digital pre-filtering code (previously used on OSC A&B)
- Removed digital enveloping of OSC A & B
- Gate oscillators when amplitude envelope hits zero (prevents audio bleed through)
- Changed filter cutoff curve (use table from MeeBlip SE)
- Scale filter cutoff knob to cover 25%-100% of knob range
- Scale filter resonance knob to cover 25%-100% of knob range
- Added bandlimited square wave tables (pulse waves were previously generated with offset sawtooth ramps)
- Raw calculated waveforms are now used in the lower 4 octaves, then switch to bandlimited wavetables.
-Flipped waveforms to match phase and avoid a pop when crossing the cut-over point
V1.01 2016.10.24
- Ensure MIDI channel settings are saved correctly when powered off for Channel 1-8 (implement MAXMIDI variable)
- Allow MIDI CC control of GLIDE knob to select waves when in wavetable mode (CC 61 now controls GLIDE in wavetable mode)
- Updated MIDI code to exit interrupt immediately if MIDI command is unrecognized
- Increased front panel switch scanning rate (10X faster)
V1.00 2016.10.19
- Initial release
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MeeBlip hardware is released under a Creative Commons Attribution-ShareAlike 4.0 International
(CC-BY-SA 4.0) license. You are free to share and transform this work, even for commercial
purposes, providing you:
1. Give appropriate credit, provide a link to the license, and indicate if changes were made.
You can say something such as "This project is based upon the MeeBlip anode synthesizer.
For more information, visit meeblip.com or download source code and design files at
https://github.com/MeeBlip"
2. If you remix, transform, or build upon the material, you must distribute your contributions
under the same license as the original. That means making source code, design files and PC
board layout files available so someone can build and modify their own version of the project.
3. The MeeBlip name is our intellectual property. You are not allowed to release commercial
devices based on our designs using the MeeBlip brand name.
Here's are links to the Creative Commons license, for the design:
http://creativecommons.org/licenses/by-sa/4.0/
http://creativecommons.org/licenses/by-sa/4.0/legalcode
MeeBlip source code and documentation is released under a GPLv3 license.
A copy is available in the MeeBlip repository at:
https://github.com/MeeBlip/meeblip-anode/blob/master/LICENSE
MeeBlip Contributors
Jarek Ziembicki - Created the original AVRsynth, upon which this project is based.
Laurie Biddulph - Worked with Jarek to translate his comments into English, ported to Atmega16
Daniel Kruszyna - Extended AVRsynth (several of his ideas are incorporated in MeeBlip)
Julian Schmidt - Original Meeblip digital filter algorithm
Axel Werner - Code optimization, bug fixes and new bandlimited waveforms
James Grahame - Meeblip hardware and firmware development